founder
1 Americannoun
verb (used without object)
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(of a ship, boat, etc.) to fill with water and sink.
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to fall or sink down, as buildings, ground, etc..
Built on a former lake bed, the building has foundered nearly ten feet.
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to become wrecked; fail utterly.
The project foundered because public support was lacking.
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to stumble, break down, or go lame, as a horse.
His mount foundered on the rocky path.
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to become ill from overeating.
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Veterinary Pathology. (of a horse) to suffer from laminitis.
verb (used with object)
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to cause to fill with water and sink.
Rough seas had foundered the ship in mid-ocean.
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Veterinary Pathology. to cause (a horse) to break down, go lame, or suffer from laminitis.
noun
noun
verb
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(of a ship) to sink
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to break down or fail
the project foundered
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to sink into or become stuck in soft ground
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to fall in or give way; collapse
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(of a horse) to stumble or go lame
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archaic (of animals, esp livestock) to become ill from overeating
noun
noun
noun
Usage
Founder is sometimes wrongly used where flounder is meant: this unexpected turn of events left him floundering (not foundering )
Other Word Forms
- unfoundered adjective
- unfoundering adjective
Etymology
Origin of founder1
First recorded in 1275–1325; Middle English found(o)ur, foundere, fundre “original builder of a city, church, castle, or city; founder of a country,” from Anglo-French fundur, from Old French fondeor, from Latin fundātōr-, stem of fundātor; found 1; -er 1 ( def. )
Origin of founder2
First recorded in 1300–50; Middle English foundren, funder, fonder, from Old French fondrer “to plunge to the bottom, submerge,” from Vulgar Latin fundorāre (unattested), derivative of fundor-, an s -stem noun interpreted as stem of Latin fundus, actually an o -stem noun (stem fund- ) “bottom”
Origin of founder3
First recorded in 1400–50; Middle English foundour, founder, from Old French fondeur, from fondre “to melt, cast”; found 3, -er 1
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Prince Harry and his fellow founder, Prince Seeiso, left the charity in March 2025 along with a group of trustees, in a dispute with the charity's chair, Sophie Chandauka.
From BBC • Apr. 10, 2026
It is reading a cold transcript under a regime of extreme deference, where a claim that feels powerful can still founder if the justices conclude that Mississippi’s reading of the record was at least reasonable.
From Slate • Apr. 10, 2026
In the Ackman-verse, where the Pershing Square Capital founder has bet billions of dollars on and against companies including Hilton and Google parent Alphabet, the focus of his social media takedown might appear downright picayune.
From The Wall Street Journal • Apr. 10, 2026
Bambaataa, often named alongside DJ Kool Herc and Grandmaster Flash as a founder of hip-hop, concerned himself with community-building after a prize trip to Africa for an essay competition in 1974 shifted his worldview.
From Los Angeles Times • Apr. 9, 2026
In the center of the quad stood a bronze statue of the school’s founder.
From "City Spies" by James Ponti
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
